Chryse Planitia

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Chryse Planitia

(krÿ -see) A relatively smooth Martian plain, 1600 km across and 2.5 km below the average planetary surface. It is centered on the areographic coordinates 27° N latitude, 40° W longitude (see areography). It appears to have suffered water erosion in the past and was chosen as the site of the Viking 1 landing in 1976. See Mars, surface features.
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Marte Vallis' morphology is similar to more ancient channel systems on Mars, especially those of the Chryse basin.
Evidence of floods in the eastern ends of the canyons suggests that the lakes dissipated by draining catastrophically to the east, then northward, down large channels into the Chryse basin.
One approach involves assessing the amount of erosion caused by floods around the Chryse basin, which covers about 10 percent of the planet.